What is the cheapest airline that flies from Colorado to Sofia?

Lufthansa is the most popular carrier operating from Colorado to Sofia

What airlines fly to Sofia?

Turkish Airlines, United Airlines and Lufthansa are the top three most popular airlines that fly to Sofia from Colorado according to our data. Turkish Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 3 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Sofia?

Flight times vary depending on what airport in Colorado you fly out of and what airport in Sofia you fly into. For example, flying from Denver to Sofia takes 17h 05m on average. On the other hand, flying from Grand Junction to Sofia takes 24h 35m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

When did momondo last update prices for flights from Colorado to Sofia Airport?

Prices for flights from Colorado to Sofia Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Colorado to Sofia Airport?

As of August 2026, there are 3 operators available to choose from for flights from Colorado to Sofia Airport.

How old do you have to be to fly from Colorado to Sofia Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The required travel and health documents for your Sofia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sofia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$362 Cheap Flights from Colorado to Sofia in 2026

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Find the cheapest flights from Colorado to Sofia

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One-way

Cheap round-trip flights

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1:20 pm - 10:55 pmGJT Grand Junction Regnl-SOF Sofia

24h 35m2 stops Denver Intl Munich Franz Josef Strauss

6:25 am - 10:10 pmSOF Sofia-GJT Grand Junction Regnl

24h 45m2 stops Frankfurt am Main Denver Intl

$739United Airlines

Mon, Feb 1 - Fri, Feb 5

8:30 pm - 8:45 amDEN Denver Intl-SOF Sofia

27h 15m1 stop Istanbul

3:50 pm - 6:25 pmSOF Sofia-DEN Denver Intl

35h 35m1 stop Istanbul

$761Turkish Airlines

Sun, Sep 20 - Mon, Oct 5

7:30 pm - 3:10 pmDEN Denver Intl-SOF Sofia

34h 40m1 stop Istanbul

4:00 pm - 5:25 pmSOF Sofia-DEN Denver Intl

34h 25m1 stop Istanbul

$776Turkish Airlines

Fri, Jan 22 - Tue, Jan 26

5:25 pm - 11:00 pmDEN Denver Intl-SOF Sofia

20h 35m1 stop Frankfurt am Main

2:00 pm - 2:30 pmSOF Sofia-DEN Denver Intl

33h 30m1 stop Munich Franz Josef Strauss

$786Lufthansa

Thu, Dec 3 - Mon, Dec 7

7:30 pm - 8:50 amDEN Denver Intl-SOF Sofia

28h 20m1 stop Istanbul

9:45 pm - 5:25 pmSOF Sofia-DEN Denver Intl

28h 40m1 stop Istanbul

$791Turkish Airlines

Fri, Jan 22 - Tue, Jan 26

5:25 pm - 11:00 pmDEN Denver Intl-SOF Sofia

20h 35m1 stop Frankfurt am Main

6:45 pm - 5:46 pmSOF Sofia-DEN Denver Intl

32h 01m2 stops Vienna Intl Toronto Pearson Intl

$797Multiple Airlines

Thu, Dec 3 - Mon, Dec 7

6:00 am - 1:15 pmDEN Denver Intl-SOF Sofia

22h 15m2 stops Newark Munich Franz Josef Strauss

6:25 am - 9:31 pmSOF Sofia-DEN Denver Intl

24h 06m2 stops Frankfurt am Main Chicago O'Hare Intl

$801United Airlines

Fri, Jan 22 - Tue, Jan 26

8:17 am - 1:15 pmDEN Denver Intl-SOF Sofia

19h 58m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:25 am - 9:25 pmSOF Sofia-DEN Denver Intl

24h 00m2 stops Frankfurt am Main Newark

$802United Airlines

Fri, Jan 22 - Tue, Jan 26

11:20 am - 6:00 pmDEN Denver Intl-SOF Sofia

21h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vienna Intl

6:45 pm - 5:46 pmSOF Sofia-DEN Denver Intl

32h 01m2 stops Vienna Intl Toronto Pearson Intl

$808Multiple Airlines

Thu, Dec 3 - Mon, Dec 7

4:15 pm - 6:20 pmDEN Denver Intl-SOF Sofia

17h 05m1 stop Munich Franz Josef Strauss

2:00 pm - 2:30 pmSOF Sofia-DEN Denver Intl

33h 30m1 stop Munich Franz Josef Strauss

$828Lufthansa

Thu, Nov 5 - Mon, Nov 9

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Air Canada flights from Colorado to Sofia

Our best Air Canada deals on Colorado to Sofia flight tickets

Air Canada

Sep 28

DEN4:17 pmDenver Intl

34h 53m

2 stops

SOF12:10 pmSofia

Oct 12

SOF2:20 pmSofia

59h 38m

2 stops

DEN4:58 pmDenver Intl

$886

Air Canada

Sep 29

DEN9:40 amDenver Intl

23h 20m

2 stops

SOF6:00 pmSofia

Oct 12

SOF2:20 pmSofia

53h 11m

2 stops

DEN10:31 amDenver Intl

$897

Air Canada

Sep 27

DEN6:05 pmDenver Intl

33h 05m

2 stops

SOF12:10 pmSofia

Oct 12

SOF2:20 pmSofia

41h 48m

2 stops

DEN11:08 pmDenver Intl

$942

Turkish Airlines flights from Colorado to Sofia

Our best Turkish Airlines deals on Colorado to Sofia flight tickets

Turkish Airlines

Sep 20

DEN8:30 pmDenver Intl

27h 15m

1 stop

SOF8:45 amSofia

Oct 5

SOF3:50 pmSofia

35h 35m

1 stop

DEN6:25 pmDenver Intl

$761

Turkish Airlines

Jan 22

DEN7:30 pmDenver Intl

34h 40m

1 stop

SOF3:10 pmSofia

Jan 26

SOF4:00 pmSofia

34h 25m

1 stop

DEN5:25 pmDenver Intl

$776

Turkish Airlines

Jan 22

DEN7:30 pmDenver Intl

28h 20m

1 stop

SOF8:50 amSofia

Jan 26

SOF9:45 pmSofia

28h 40m

1 stop

DEN5:25 pmDenver Intl

$791

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Grand JunctionSofia

GJT Grand Junction Regnl - SOF Sofia

GJTSOF

Grand Junction Regnl

Mon 2/1

1:20 pm-10:55 pm

2 stops24h 35m

Sofia

Fri 2/5

6:25 am-10:10 pm

2 stops24h 45m

$739

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Sun 9/20

8:30 pm-8:45 am

1 stop27h 15m

Sofia

Mon 10/5

3:50 pm-6:25 pm

1 stop35h 35m

$761

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Fri 1/22

7:30 pm-3:10 pm

1 stop34h 40m

Sofia

Tue 1/26

4:00 pm-5:25 pm

1 stop34h 25m

$776

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Thu 12/3

5:25 pm-11:00 pm

1 stop20h 35m

Sofia

Mon 12/7

2:00 pm-2:30 pm

1 stop33h 30m

$786

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Fri 1/22

7:30 pm-8:50 am

1 stop28h 20m

Sofia

Tue 1/26

9:45 pm-5:25 pm

1 stop28h 40m

$791

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Thu 12/3

5:25 pm-11:00 pm

1 stop20h 35m

Sofia

Mon 12/7

6:45 pm-5:46 pm

2 stops32h 01m

$797

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Fri 1/22

6:00 am-1:15 pm

2 stops22h 15m

Sofia

Tue 1/26

6:25 am-9:31 pm

2 stops24h 06m

$801

Quickest round-trip

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Fri 1/22

8:17 am-1:15 pm

2 stops19h 58m

Sofia

Tue 1/26

6:25 am-9:25 pm

2 stops24h 00m

$802

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Thu 12/3

11:20 am-6:00 pm

2 stops21h 40m

Sofia

Mon 12/7

6:45 pm-5:46 pm

2 stops32h 01m

$808

DenverSofia

DEN Denver Intl - SOF Sofia

DENSOF

Denver Intl

Thu 11/5

4:15 pm-6:20 pm

1 stop17h 05m

Sofia

Mon 11/9

2:00 pm-2:30 pm

1 stop33h 30m

$828

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from Colorado to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Colorado is in November. Flight prices, which tend to average around $600, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Sofia from Colorado during March instead. Flights to Sofia in March, while not as cheap as those in November, still average around $623.

How far in advance should I book a flight from Colorado to Sofia?

You are more likely to see cheaper flights to Sofia from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $781 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Colorado for as low as $622 on momondo.

Can stopping save me money on Colorado to Sofia flights?

You could potentially save up to 3% on your flight if you consider stops on a Colorado to Sofia flight.

Cheap Colorado to Sofia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to Sofia

Fastest flight time	17h 05m
Direct flights	None

The fastest flight from Colorado to Sofia takes 17h 05m

There are no direct flights from Colorado to Sofia. There are no popular flight routes from Colorado to Sofia.

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Frequently asked questions about flying from Colorado to Sofia

When did momondo last update prices for flights from Colorado to Sofia Airport?
Prices for flights from Colorado to Sofia Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Colorado to Sofia Airport?
As of August 2026, there are 3 operators available to choose from for flights from Colorado to Sofia Airport.
How old do you have to be to fly from Colorado to Sofia Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The required travel and health documents for your Sofia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sofia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Colorado to Sofia

Compare and see reviews for airlines that fly from Colorado to Sofia with momondo

Airline	Rating	Free Cancellation	Price
Turkish Airlines	PriceFrom $568	Free Cancellation	Rating 7.4 4,480 reviews	Search Turkish Airlines flights
Lufthansa	PriceFrom $634	Free Cancellation	Rating 6.8 8,176 reviews	Search Lufthansa flights
United Airlines	PriceFrom $686	Free Cancellation	Rating 7.4 10,101 reviews	Search United Airlines flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to Sofia?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Sofia from Colorado.

Can I find flights from Colorado to Sofia with flexible booking policies on momondo?

Flights from Colorado to Sofia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Colorado to Sofia?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Colorado to Sofia.

I’m not ready to book a flight from Colorado to Sofia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Colorado to Sofia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sofia and let you know when they change.

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Cheap flights from Colorado to Sofia from $362

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Sofia departing on 9/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from Colorado to Sofia

Our best Air Canada deals on Colorado to Sofia flight tickets

Turkish Airlines flights from Colorado to Sofia

Our best Turkish Airlines deals on Colorado to Sofia flight tickets

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How to get the cheapest flight ticket from Colorado to Sofia

What is the cheapest month to fly to Sofia?

How far in advance should I book a flight from Colorado to Sofia?

Can stopping save me money on Colorado to Sofia flights?

What is the cheapest airline that flies from Colorado to Sofia?

What airlines fly to Sofia?

How long does it take to fly to Sofia?

Cheap Colorado to Sofia flight deals and tips

Fastest flight time

Direct flights

Frequently asked questions about flying from Colorado to Sofia

Best airlines flying from Colorado to Sofia

Compare and see reviews for airlines that fly from Colorado to Sofia with momondo

Traveling to a place near Sofia?

Why use momondo?

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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Cabin classes currently available on flights to Sofia

List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

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